Drilling equipment for oil-gas exploration

Abstract

The invention relates to the related technical field of oil and gas drilling, in particular to drilling equipment for oil and gas exploration. Drilling equipment for oil-gas exploration comprises a vehicle body, a screw elevator is installed on the upper portion of the vehicle body, a lifting plate is in threaded connection with a screw of the screw elevator, a fixing plate is connected to the side, close to the screw elevator, of the vehicle body, and a sampling mechanism is arranged on the lifting plate. The spiral drill bit is installed on the lower side of the rock core pipe through the threaded sleeve so that the rock core pipe and the spiral drill bit can be drilled into the ground together, the threaded sleeve can be blocked through the blocking block so that soil can be sampled only when the rock core pipe drills downwards to the position needing sampling, and therefore soil sampling can be completed through one-time drilling; the complexity and the tedious degree of soil sampling operation are reduced, the operation steps of drilling and sampling are simplified, and the sampling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to oil and gas drilling, and in particular to a drilling device for oil and gas exploration. Background Art

[0002] Oil and gas exploration refers to geological surveys, geophysical exploration, drilling and related activities carried out to identify exploration areas and find out oil and gas reserves. It is the first key link in oil and gas extraction.

[0003] During oil and gas exploration, it is necessary to sample soil at a fixed drilling depth in order to analyze it. Currently, when sampling soil, the ground is first drilled with a drill rod to form a channel leading to the underground oil and gas layer. After the drilling is completed, the drill rod is taken out of the channel, and then the drill rod is removed and the upper core tube is replaced. The core tube is then drilled into the channel leading to the underground oil and gas layer to sample soil. After the soil sampling is completed, the core tube is taken out of the channel, and then the core tube is manually knocked to take out the soil sample from the core tube. In this way, the drilling needs to be repeated twice to complete the sampling of the soil, which not only increases the complexity and tediousness of the operation, but also leads to low sampling efficiency. In addition, the method of manually knocking the core tube to take out the soil sample requires more time and energy, which not only further increases the complexity and tediousness of the operation, but also further reduces the sampling efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a drilling device for oil and gas exploration that can simplify the operation steps of drilling and sampling and can automatically knock the core tube to take out the soil sample in order to solve the above problems.

[0005] The present invention achieves the above object through the following technical solutions: A drilling device for oil and gas exploration, including a vehicle body. A screw lift is installed on the upper part of the vehicle body. A lifting plate is threadedly connected to the screw of the screw lift. One side of the vehicle body close to the screw lift is connected with a fixed plate. A sampling mechanism is provided on the lifting plate. The sampling mechanism includes a core tube rotatably connected to the lifting plate. The bottom end of the core tube penetrates through the fixed plate. A servo motor is installed on the top of the lifting plate. The output shaft of the servo motor is connected to the top end of the core tube. The lower part of the outer wall of the core tube is connected with a threaded sleeve by threaded connection. The lower part inside the threaded sleeve is connected with a spiral drill bit through a connecting rod. The spiral drill bit extends out of the threaded sleeve. An electric push rod I is installed in the upper part of the core tube. A blocking block for blocking the threaded sleeve is connected to the electric push rod I. After the blocking block moves upward and does not block the threaded sleeve, the spiral drill bit rotates to transport the soil upward, so that the soil enters the core tube through the gap between the connecting rod and the threaded sleeve. A knocking mechanism is provided on the outer wall of the core tube. The knocking mechanism includes an annular connecting plate slidably sleeved on the outer wall of the core tube. The bottom of the annular connecting plate is circumferentially and spacedly connected with telescopic rods. The telescopic rods penetrate through the fixed plate. The outer rod of the telescopic rod is fixedly connected to the fixed plate. Four knocking blocks that can approach and move away from each other radially are spacedly provided on the top of the annular connecting plate. The four knocking blocks are annularly distributed. The four knocking blocks approaching each other can knock on the outer wall of the core tube. A driving mechanism for driving the four knocking blocks to approach and move away from each other is provided on the annular connecting plate. A lifting mechanism for driving the annular connecting plate to lift is provided on the vehicle body.

[0006] Preferably, the shape of the blocking block is an inverted cone. A clamping groove that engages with the connecting rod and the connecting shaft on the spiral drill bit is opened on the blocking block. The blocking block is clamped on the connecting rod and the connecting shaft of the spiral drill bit to block the threaded sleeve, so that the threaded sleeve forms a closed space.

[0007] Preferably, the driving mechanism includes a spring I connected between the knocking block and the annular connecting plate. A rotating cylinder with an open bottom is rotatably connected to the outer wall of the annular connecting plate. A through hole for the core tube to move is opened at the top of the rotating cylinder. A rectangular groove is opened at the inner top of the rotating cylinder. The top of each of the four knocking blocks is connected with a push rod. The push rod is located in the rectangular groove. A short bevel gear is connected to the outer wall of the rotating cylinder. A long bevel gear that can rotate is provided on the fixed plate. The long bevel gear meshes with the short bevel gear. A double-shaft motor is installed on one side of the vehicle body close to the long bevel gear. The lower output shaft of the double-shaft motor is in transmission connection with the connecting shaft of the long bevel gear to drive the long bevel gear to rotate. Then, the rotating cylinder is driven to rotate through the short bevel gear. After the right angle of the rectangular groove on the rotating cylinder rotates away from the push rod, the rotating cylinder continues to rotate and pushes the four push rods to approach each other through the rectangular groove, so that the four knocking blocks approach each other to knock on the outer wall of the core tube. When the right angle of the rectangular groove on the rotating cylinder rotates to align with the push rod, the four knocking blocks move away from each other under the pushing action of the spring I.

[0008] Preferably, the lifting mechanism includes a connecting plate and an annular plate. The top of the annular connecting plate is circumferentially and spacedly connected with connecting plates. The connecting plates are located between two adjacent knocking blocks and within the through holes on the rotating cylinder. An annular plate is connected between the tops of the connecting plates. The annular plate is located above the rotating cylinder and is slidably sleeved on the outer wall of the core tube. A frame is connected to the top of the vehicle body. A fixed pulley is installed on the upper part of the frame. A winding disc capable of rotating is provided on the top of the vehicle body. A pulling rope is wound around the winding disc. The pulling rope bypasses the fixed pulley and is connected to the annular plate. A rotating shaft is rotatably connected to one side of the vehicle body close to the dual-axis motor. A bevel gear set is connected between the rotating shaft and the upper output shaft of the dual-axis motor. The rotating shaft is in transmission connection with the connecting shaft of the winding disc.

[0009] Preferably, a pretreatment mechanism is provided at the lower part of the vehicle body. The pretreatment mechanism includes an electric push rod II installed at the lower part of the vehicle body. A cleaning plate is connected to the electric push rod II. The cleaning plate moves towards the direction close to the spiral drill bit to push away the sundries at the ground drilling position.

[0010] Preferably, a cleaning mechanism is provided at one side of the lower part of the vehicle body close to the cleaning plate. The cleaning mechanism includes a mounting plate connected to one side of the lower part of the vehicle body close to the cleaning plate. A scraping plate capable of moving up and down is provided on the mounting plate. A spring II for driving the scraping plate to be in close contact with the cleaning plate is connected between the scraping plate and the mounting plate. The sundries remaining on the cleaning plate can be scraped off by the scraping plate.

[0011] Preferably, an inverted U-shaped clamping plate is connected to one side of the top of the vehicle body away from the frame. A collection frame for collecting soil samples is clamped within the inverted U-shaped clamping plate.

[0012] Preferably, the bottom of the scraping plate is beveled, and the side of the cleaning plate facing away from the electric push rod is beveled. When the cleaning plate moves to clean the sundries, the bevel on the cleaning plate pushes the bevel at the bottom of the scraping plate, so that the scraping plate moves up, avoiding the scraping plate from hindering the cleaning plate from cleaning the sundries.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Installing the spiral drill bit under the core tube through the threaded sleeve can enable the core tube and the spiral drill bit to drill into the ground together. The threaded sleeve can be blocked by the plug block, so that the soil can be sampled only when the core tube drills down to the position where sampling is required. Therefore, the present invention can complete the soil sampling in one drilling, reducing the complexity and tediousness of the soil sampling operation, simplifying the operation steps of drilling and sampling, and improving the sampling efficiency.

[0014] 2. Through the cooperation of components such as the rotating cylinder, rectangular groove, push rod, and spring I, the four knocking blocks can approach and move away from each other. The four knocking blocks approach each other to knock on the outer wall of the core tube, so that the soil sample in the core tube loosens and separates from the inner wall of the core tube, enabling the soil sample to fall out of the core tube, achieving the effect of automatically knocking on the core tube to take out the soil sample. And when the blocking block moves downward, it can push out the soil sample in the core tube to improve the efficiency of taking out the soil sample, thereby further improving the sampling efficiency.

[0015] 3. By rotating the winding disc to wind up the pulling rope and rotating in the reverse direction to release the pulling rope, the annular connecting plate can drive the knocking block to move up and down to evenly knock on the area with soil in the core tube during sampling, causing the soil sample in the core tube to fall quickly, so as to further improve the efficiency of taking out the soil sample.

[0016] 4. The cleaning plate can push away the sundries at the ground drilling position to automatically complete the cleaning of the sundries, thus avoiding the influence of sundries on subsequent drilling and sampling.

[0017] 5. The spring II can make the scraper closely adhere to the cleaning plate to scrape off the sundries remaining on the cleaning plate, preventing the sundries from staying on the cleaning plate and affecting subsequent use. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0019] Figure 2 It is a three-dimensional structure diagram of the sampling mechanism of the present invention.

[0020] Figure 3 It is a partial three-dimensional structure schematic diagram of the sampling mechanism of the present invention Figure 1 。

[0021] Figure 4 It is a partial three-dimensional structure schematic diagram of the sampling mechanism of the present invention Figure 2 。

[0022] Figure 5 It is a partial three-dimensional structure schematic diagram of the sampling mechanism of the present invention Figure 3 。

[0023] Figure 6 It is a three-dimensional structure diagram of the knocking mechanism of the present invention.

[0024] Figure 7 It is a partial three-dimensional structure diagram of the knocking mechanism of the present invention.

[0025] Figure 8 It is a connection diagram of the annular connecting plate, connecting plate, and annular plate of the present invention.

[0026] Figure 9This is the installation schematic diagram of the lifting mechanism of the present invention.

[0027] Figure 10 This is the three-dimensional structure schematic diagram of the lifting mechanism of the present invention.

[0028] Figure 11 This is the installation schematic diagram of the pretreatment mechanism and the cleaning mechanism of the present invention.

[0029] Figure 12 This is the three-dimensional structure schematic diagram of the pretreatment mechanism and the cleaning mechanism of the present invention.

[0030] The reference signs in the drawings are: 1 - vehicle body, 2 - screw lift, 3 - lifting plate, 4 - fixing plate, 51 - core barrel, 52 - servo motor, 53 - threaded sleeve, 54 - spiral drill bit, 55 - electric push rod I, 56 - plug, 57 - connecting rod, 61 - telescopic rod, 62 - annular connecting plate, 63 - knocking block, 64 - spring I, 65 - rotating cylinder, 66 - rectangular groove, 67 - pushing rod, 68 - short bevel gear, 69 - long bevel gear, 610 - biaxial motor, 71 - connecting plate, 72 - annular plate, 73 - frame, 74 - fixed pulley, 75 - winding disc, 76 - pulling rope, 77 - rotating shaft, 78 - bevel gear set, 81 - electric push rod II, 82 - cleaning plate, 91 - mounting plate, 92 - scraping plate, 93 - spring II, 10 - inverted U-shaped clamping plate, 11 - collection box. Detailed implementation manners

[0031] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0032] A drilling device for oil and gas exploration, see Figures 1-10, including a vehicle body 1, a screw lift 2 is installed on the front side of the top of the vehicle body 1. A lifting plate 3 is threadedly connected to the screw of the screw lift 2. A fixing plate 4 is connected to the front side of the vehicle body 1. A sampling mechanism is provided on the lifting plate 3. The sampling mechanism includes a core tube 51 rotatably connected to the lifting plate 3. The bottom end of the core tube 51 penetrates through the fixing plate 4. A servo motor 52 is installed on the top of the lifting plate 3. The output shaft of the servo motor 52 is connected to the top end of the core tube 51. A threaded sleeve 53 is connected to the lower part of the outer wall of the core tube 51 by threaded connection. A spiral drill bit 54 is connected to the lower part of the threaded sleeve 53 through a connecting rod 57. The spiral drill bit 54 extends out of the threaded sleeve 53. An electric push rod I 55 is installed in the upper part of the core tube 51. A blocking block 56 for blocking the threaded sleeve 53 is connected to the electric push rod I 55. The shape of the blocking block 56 is an inverted cone. A clamping groove for clamping the connecting rod 57 and the connecting shaft on the spiral drill bit 54 is formed on the blocking block 56. The blocking block 56 is clamped on the connecting rod 57 and the connecting shaft of the spiral drill bit 54 to block the threaded sleeve 53, so that the threaded sleeve 5 forms a closed space. A knocking mechanism is provided on the outer wall of the core tube 51. The knocking mechanism includes an annular connecting plate 62 slidably sleeved on the outer wall of the core tube 51. Four telescopic rods 61 are circumferentially and spacedly connected to the bottom of the annular connecting plate 62. The telescopic rods 61 penetrate through the fixing plate 4. The outer rod of the telescopic rod 61 is fixedly connected to the fixing plate 4. Four knocking blocks 63 that can approach and move away from each other radially are slidably connected to the top of the annular connecting plate 62 through a chute. The four knocking blocks 63 are annularly distributed. The four knocking blocks 63 approaching each other can knock on the outer wall of the core tube 51. A driving mechanism for driving the four knocking blocks 63 to approach and move away from each other is provided on the annular connecting plate 62. A lifting mechanism for driving the annular connecting plate 62 to lift is provided on the vehicle body 1.

[0033] First, move this device to the drilling area. Then, control the servo motor 52 to operate to drive the core barrel 51 to rotate. The rotation of the core barrel 51 drives the rotation of the threaded sleeve 53, and then drives the rotation of the screw drill bit 54 through the connecting rod 57. At the same time, control the screw elevator 2 to drive the lifting plate 3 to move downward, so that the core barrel 51 and the screw drill bit 54 move downward. The rotation and downward movement of the screw drill bit 54 can drill holes in the ground, so that the core barrel 51 can penetrate into the ground. At this time, the blocking block 56 blocks the threaded sleeve 53, and the soil will not enter the core barrel 51. And the rotation of the core barrel 51 drives the blocking block 56 to rotate through the electric push rod I 55. The rotation of the inverted conical blocking block 56 can push the soil to the side, so that the blocking block 56 and the core barrel 51 can penetrate into the ground more stably and smoothly. When the screw drill bit 54 drills down to the position where sampling is required, control the electric push rod I 55 to pull the blocking block 56 upward to unblock the threaded sleeve 53. Then the screw drill bit 54 rotates to transport the soil upward, so that the soil enters the core barrel 51 through the gap between the connecting rod 57 and the threaded sleeve 53, so as to complete the sampling of the soil in one drilling operation, reducing the complexity and tediousness of the soil sampling operation, simplifying the operation steps of drilling and sampling, and improving the sampling efficiency. After sampling is completed, control the screw elevator 2 to drive the lifting plate 3 to move upward to pull out the core barrel 51 and the screw drill bit 54 from the ground. Then, unscrew the threaded sleeve 53 from the core barrel 51, so that the threaded sleeve 53, the connecting rod 57 and the screw drill bit 54 are separated from the core barrel 51, facilitating the subsequent removal of the soil sample in the core barrel 51. Then, control the driving mechanism to operate to drive the four knocking blocks 63 to approach and move away from each other. The four knocking blocks 63 approach each other to knock on the outer wall of the core barrel 51, so that the soil sample in the core barrel 51 is loosened and separated from the inner wall of the core barrel 51, so that the soil sample can fall out of the core barrel 51. The lifting mechanism can drive the annular connecting plate 62 to lift and lower, so that the knocking blocks 63 lift and lower to evenly knock on the area of the core barrel 51 where there is soil for sampling, so that the soil sample in the core barrel 51 can quickly fall, so as to improve the extraction efficiency of the soil sample. And the electric push rod I 55 can be controlled to push the blocking block 56 downward. The downward movement of the blocking block 56 can push out the soil sample in the core barrel 51, so as to further improve the extraction efficiency of the soil sample, and thus further improve the sampling efficiency.

[0034] See Figures 6-7, the driving mechanism includes a spring I 64 connected between the knocking block 63 and the annular connecting plate 62. An open-bottomed rotating cylinder 65 is rotatably connected to the outer wall of the annular connecting plate 62 through an annular slide rail. A through hole is formed at the top of the rotating cylinder 65 for the core tube 51 to move up and down and rotate. A rectangular groove 66 is formed at the inner top of the rotating cylinder 65. The tops of the four knocking blocks 63 are all connected with push rods 67. The push rods 67 are located in the rectangular groove 66. A short bevel gear 68 is connected to the outer wall of the rotating cylinder 65. A long bevel gear 69 is rotatably connected to the fixed plate 4. The long bevel gear 69 meshes with the short bevel gear 68. A double-shaft motor 610 is installed on the front side of the vehicle body 1. The double-shaft motor 610 is located above the fixed plate 4 and behind the long bevel gear 69. The lower output shaft of the double-shaft motor 610 is in transmission connection with the connecting shaft of the long bevel gear 69. In the present invention, the lower output shaft of the double-shaft motor 610 can be in transmission connection with the connecting shaft of the long bevel gear 69 through a belt transmission assembly, a synchronous belt transmission assembly or a chain transmission assembly.

[0035] Control the double-shaft motor 610 to work to drive the long bevel gear 69 to rotate, and then drive the rotating cylinder 65 to rotate through the short bevel gear 68. When the right angle of the rectangular groove 66 on the rotating cylinder 65 rotates away from the push rod 67, the rotating cylinder 65 continues to rotate and pushes the four push rods 67 to approach each other through the rectangular groove 66, so that the four knocking blocks 63 approach each other to knock the outer wall of the core tube 51, and the spring I 64 is compressed accordingly. When the right angle of the rectangular groove 66 on the rotating cylinder 65 rotates to align with the push rod 67, under the reset action of the spring I 64, the four knocking blocks 63 move away from each other, achieving the effect of being able to automatically knock the core tube 51 to take out the soil sample.

[0036] See Figures 8-10, the lifting mechanism includes a connecting plate 71 and an annular plate 72. Four connecting plates 71 are connected to the top of the annular connecting plate 62 at circumferential intervals. The connecting plate 71 is located between two adjacent knocking blocks 63 and within the through holes on the rotating cylinder 65. An annular plate 72 is connected between the tops of the four connecting plates 71. The annular plate 72 is located above the rotating cylinder 65 and is slidably sleeved on the outer wall of the core tube 51. The front side of the top of the vehicle body 1 is connected with a frame 73. Two fixed pulleys 74 that are symmetrically arranged front and back are rotatably installed on the upper part of the frame 73. The top of the vehicle body 1 is rotatably connected with a wire winding disc 75. The wire winding disc 75 is located at the rear side of the frame 73. A pull rope 76 is wound around the wire winding disc 75. The pull rope 76 bypasses the fixed pulley 74 and is connected with the annular plate 72. The upper part of the front side of the vehicle body 1 is rotatably connected with a rotating shaft 77. The rotating shaft 77 is located above the dual-axis motor 610. A bevel gear set 78 is connected between the rotating shaft 77 and the upper output shaft of the dual-axis motor 610. The bevel gear set 78 is composed of two bevel gears. One of the bevel gears is connected to the upper output shaft of the dual-axis motor 610, and the other bevel gear is connected to the rotating shaft 77. The two bevel gears are meshed. The rotating shaft 77 is in transmission connection with the connecting shaft of the wire winding disc 75. In the present invention, the rotating shaft 77 can be in transmission connection with the connecting shaft of the wire winding disc 75 through a belt transmission assembly, a synchronous belt transmission assembly or a chain transmission assembly.

[0037] When the dual-axis motor 610 rotates, it drives the rotating shaft 77 to rotate through the bevel gear set 78. When the rotating shaft 77 rotates, it drives the wire winding disc 75 to rotate and wind up the pull rope 76. The annular plate 72 is pulled up by the pull rope 76. When the annular plate 72 rises, it pulls the annular connecting plate 62 to rise through the connecting plate 71. When the annular connecting plate 62 rises to an appropriate height, the dual-axis motor 610 is controlled to rotate in the reverse direction, so that the wire winding disc 75 rotates in the reverse direction to release the pull rope 76. Under the action of gravity, the annular connecting plate 62 descends and resets. The lifting and lowering of the annular connecting plate 62 drives the knocking block 63 and the rotating cylinder 65 thereon to lift and lower, so as to evenly knock the area with soil in the core tube 51, so that the soil sample in the core tube 51 quickly drops.

[0038] See Figures 11-12 , a pretreatment mechanism is provided at the lower part of the vehicle body 1. The pretreatment mechanism includes an electric push rod II 81 installed at the rear side of the lower part of the vehicle body 1, and a cleaning plate 82 is connected to the electric push rod II 81.

[0039] Control the electric push rod II 81 to push the cleaning plate 82 to move towards the direction close to the screw drill 54, so as to push away the sundries at the ground drilling position. In this way, it can avoid the sundries from affecting the subsequent drilling and sampling. When the sundries are cleaned up, control the electric push rod II 81 to pull the cleaning plate 82 to move back to its original position.

[0040] See Figures 11-12, a cleaning mechanism is provided on the front side of the lower part of the vehicle body 1. The cleaning mechanism includes a mounting plate 91 connected to the front side of the lower part of the vehicle body 1. A scraping plate 92 capable of moving up and down is slidably connected to the mounting plate 91 through a sliding rod. A spring II 93 for driving the scraping plate 92 to closely adhere to the cleaning plate 82 is connected between the scraping plate 92 and the mounting plate 91. The bottom of the scraping plate 92 is beveled, and the side of the cleaning plate 82 facing away from the electric push rod is beveled.

[0041] When the cleaning plate 82 moves to clean the sundries at the ground drilling position, the bevel on the cleaning plate 82 pushes the bevel at the bottom of the scraping plate 92, so that the scraping plate 92 moves upward, avoiding the scraping plate 92 from obstructing the cleaning of the sundries by the cleaning plate 82 and ensuring the smooth operation of the cleaning of the sundries by the cleaning plate 82. When the cleaning plate 82 moves back to its original position, the sundries remaining on the cleaning plate 82 can be scraped off by the scraping plate 92 to prevent the sundries from staying on the cleaning plate 82 and affecting subsequent use.

[0042] See Figure 11 , a reverse U-shaped clamping plate 10 is connected to the rear side of the top of the vehicle body 1, and a collection box 11 for collecting soil samples is clamped inside the reverse U-shaped clamping plate 10.

[0043] By clamping the collection box 11 with the reverse U-shaped clamping plate 10, it is possible to prevent the collection box 11 from moving and falling when the equipment is running. Pulling out the collection box 11 from the reverse U-shaped clamping plate 10 and placing it under the core tube 51 can collect the soil samples falling out of the core tube 51, so as to facilitate the subsequent taking of soil samples for analysis.

[0044] The above embodiments only express the implementation modes of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A drilling device for oil and gas exploration, comprising a vehicle body (1), a screw elevator (2) is installed on the upper part of the vehicle body (1), a lifting plate (3) is threadedly connected to the screw of the screw elevator (2), and a fixing plate (4) is connected to one side of the vehicle body (1) close to the screw elevator (2), characterized in that, A sampling mechanism is provided on the lifting plate (3). The sampling mechanism includes a core tube (51) rotatably connected to the lifting plate (3). The bottom end of the core tube (51) penetrates through the fixing plate (4). A servo motor (52) is installed at the top of the lifting plate (3). The output shaft of the servo motor (52) is connected to the top end of the core tube (51). A threaded sleeve (53) is connected to the lower part of the outer wall of the core tube (51) by a threaded connection. A screw drill (54) is connected to the lower part inside the threaded sleeve (53) through a connecting rod (57). The screw drill (54) extends out of the threaded sleeve (53). An electric push rod I (55) is installed at the upper part inside the core tube (51). A blocking block (56) for blocking the threaded sleeve (53) is connected to the electric push rod I (55). After the blocking block (56) moves upward and does not block the threaded sleeve (53), the screw drill (54) rotates to transport the soil upward, so that the soil enters the core tube (51) through the gap between the connecting rod (57) and the threaded sleeve (53). A knocking mechanism is provided on the outer wall of the core tube (51). The knocking mechanism includes an annular connecting plate (62) slidably sleeved on the outer wall of the core tube (51). The bottom of the annular connecting plate (62) is circumferentially and spacedly connected with telescopic rods (61). The telescopic rods (61) penetrate through the fixing plate (4). The outer rods of the telescopic rods (61) are fixedly connected to the fixing plate (4). Four knocking blocks (63) that can approach and move away from each other radially are spacedly provided at the top of the annular connecting plate (62). The four knocking blocks (63) are symmetrically distributed with the annular connecting plate (62) as the center. The four knocking blocks (63) can approach each other to knock on the outer wall of the core tube (51). A driving mechanism for driving the four knocking blocks (63) to approach and move away from each other is provided on the annular connecting plate (62). A lifting mechanism for driving the annular connecting plate (62) to lift is provided on the vehicle body (1).

2. The drilling equipment for oil and gas exploration according to claim 1, characterized in that, The blocking block (56) is in the shape of an inverted cone. A clamping groove that engages with the connecting rod (57) and the connecting shaft on the screw drill (54) is formed on the blocking block (56). The blocking block (56) is clamped on the connecting shaft of the connecting rod (57) and the screw drill (54) to block the threaded sleeve (53), so that the threaded sleeve (53) forms a closed space.

3. A drilling device for oil and gas exploration according to claim 1, characterized in that The driving mechanism includes a spring I (64) connected between the knocking block (63) and the annular connecting plate (62). A rotary cylinder (65) with an open bottom is rotatably connected to the outer wall of the annular connecting plate (62). A through hole for the core tube (51) to move is formed at the top of the rotary cylinder (65). A rectangular groove (66) is formed at the inner top of the rotary cylinder (65). Push rods (67) are connected to the tops of the four knocking blocks (63). The push rods (67) are located in the rectangular groove (66). A short bevel gear (68) is connected to the outer wall of the rotary cylinder (65). A long bevel gear (69) capable of rotating is provided on the fixed plate (4). The long bevel gear (69) meshes with the short bevel gear (68). A double-shaft motor (610) is installed on one side of the vehicle body (1) close to the long bevel gear (69). The lower output shaft of the double-shaft motor (610) is drivingly connected to the connecting shaft of the long bevel gear (69) to drive the long bevel gear (69) to rotate. Then, the rotary cylinder (65) is driven to rotate through the short bevel gear (68). After the right angle of the rectangular groove (66) on the rotary cylinder (65) rotates away from the push rod (67), the rotary cylinder (65) continues to rotate and pushes the four push rods (67) to approach each other through the rectangular groove (66), so that the four knocking blocks (63) approach each other to knock the outer wall of the core tube (51). When the right angle of the rectangular groove (66) on the rotary cylinder (65) rotates to align with the push rod (67), the four knocking blocks (63) move away from each other under the pushing action of the spring I (64).

4. A drilling device for oil and gas exploration according to claim 3, characterized in that, The lifting mechanism includes a connecting plate (71) and an annular plate (72). The annular connecting plate (62) is connected with the connecting plate (71) at intervals along the circumference at the top. The connecting plate (71) is located between two adjacent knocking blocks (63) and in the through hole on the rotary cylinder (65). An annular plate (72) is connected between the tops of the connecting plates (71). The annular plate (72) is located above the rotary cylinder (65) and is slidably sleeved on the outer wall of the core tube (51). A frame (73) is connected to the top of the vehicle body (1). A fixed pulley (74) is installed on the upper part of the frame (73). A winding disc (75) capable of rotating is provided at the top of the vehicle body (1). A pull rope (76) is wound on the winding disc (75). The pull rope (76) bypasses the fixed pulley (74) and is connected with the annular plate (72). A rotating shaft (77) is rotatably connected to one side of the vehicle body (1) close to the double-shaft motor (610). A bevel gear set (78) is connected between the rotating shaft (77) and the upper output shaft of the double-shaft motor (610). The rotating shaft (77) is drivingly connected to the connecting shaft of the winding disc (75).

5. A drilling device for oil and gas exploration according to claim 1, characterized in that, A pretreatment mechanism is provided at the lower part of the vehicle body (1). The pretreatment mechanism includes an electric push rod II (81) installed at the lower part of the vehicle body (1). A cleaning plate (82) is connected to the electric push rod II (81). The cleaning plate (82) moves towards the direction close to the spiral drill bit (54) to push away the sundries at the ground drilling position.

6. The drilling equipment for oil and gas exploration according to claim 5, characterized in that, A cleaning mechanism is provided on one side of the lower part of the vehicle body (1) close to the cleaning plate (82). The cleaning mechanism includes a mounting plate (91) connected to one side of the lower part of the vehicle body (1) close to the cleaning plate (82). A scraping plate (92) capable of moving up and down is provided on the mounting plate (91). A spring II (93) for driving the scraping plate (92) to closely adhere to the cleaning plate (82) is connected between the scraping plate (92) and the mounting plate (91). Debris remaining on the cleaning plate (82) can be scraped off by the scraping plate (92).

7. A drilling device for oil and gas exploration according to claim 4, characterized in that, A reversed U-shaped clamping plate (10) is connected to one side of the top of the vehicle body (1) away from the frame (73). A collection frame (11) for collecting soil samples is clamped inside the reversed U-shaped clamping plate (10).

8. A drilling device for oil and gas exploration according to claim 6, characterized in that, The bottom of the scraping plate (92) is beveled, and the side of the cleaning plate (82) facing away from the electric push rod is beveled. When the cleaning plate (82) moves to clean debris, the bevel on the cleaning plate (82) pushes the bevel at the bottom of the scraping plate (92), so that the scraping plate (92) moves upward, avoiding the scraping plate (92) from obstructing the cleaning plate (82) to clean debris.

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